Sash-lock.



No. 687,327. Patented Nov. 26, I90l.

E. MILLER.

SASH LOCK.

(Application filed Feb. 9, 1901.)

Modal.

gag-i NITED STATEs ATENT mes.

ELIAS MILLER, OF CHICAGO, ILLINOIS.

SASH-LOCK.

SPECIFICATION forming part of Letters Patent No. 687,327, dated November 26, 1901. Application filed February 9, 1901. Serial No. 46,692. (No model) To-aZZ whom it may concern:

Be it known that I, ELTAS MILLER, a citizen of the United States, residing at Chicago, in

the county of Cook and State of Illinois, have invented new and useful Improvements in Sash-Locks, of which the following is a specification.

This invention relatesto window-sash fastenings; and the object is to provide a cheap, durable, and efficient lock which will automatically secure the upper and lower sashes together when in their proper relative positions.

With this object in view the invention consists in the novel construction and combination of parts, hereinafter more fully described and claimed, and illustrated in the accompanying drawings, showing the preferred form of my invention, and in Which Figure 1 is a perspective view of the catch already tripped. Fig. 2 is a top plan view showing the parts in unlocked position. Fig. 3 is a plan view of the device, partly in horizontal section, showing the parts in locked position. Fig. 4: is a cross-section on line 3 3, Fig. 3; and Fig. 5 is a perspective view of the latch turned free from. the rail of the lower sash and so held by the trigger. Fig. 6 is a detail view of the actuating-spring and the trigger. V

Referring now to the drawings by reference characters, 1 designates the bottom rail of the upper sliding sash, and 2 the top rail of the lower one.

To the upp er sash rail I secure the lock mechanism, which consists of a plate 3, provided intermediate its ends with a conicalshaped vertically-projecting spindle 4, on which is mounted a sleeve 5, formed with a laterally-extending hooked catch 6, which is designed to engage a cam-slot in the plate on the rail 2 and to be hereinafter referred to. The sleeve 5 is actuated. by a torsional spiral spring 7, mounted on the'spindle in an annular groove 8 at the base thereof and having one end secured on a perforation 10 in the sleeve. The lower coil of the spring 7 is extended and formed into an eye 11, which is arranged on a pin 11 in the plate 3, the interior of the sleeve at the portion occupied by the spring being enlarged to afiord room for the action of the spring. From the eye 11 the wire of the spring is extended to form a trigger or latch 12, the outer portion of which is directed forward sufficiently to normally stand free from the plate, and in order that this trigger may be held in proper position a pin 14. is fastened in the plate, against which the trigger is held when the catch of the sleeve engages behind it. The pin 11 is set in a depression or recess 0, from which extends a longitudinally-arranged groove 18, formed in the plate, in which groove the trigger lodges when depressed. The lower end of the sleeve 5 bears on the end of the pin 11, and thus serves as a means for preventing the eye 11 from lifting or the pin.

On the upper rail of the lower sash is secured a plate 16, formed with a cam-groove 17, in which the hooked end of the catch 6 engages to lock the sashes together. The plate 16 at the end adjacent to the trigger is formed with an inwardly-extending trip or lug 15, which engages the raised portion of the trigger, depressing that element and releasing the catch 6 when it is held behind the trigger.

It will be perceived from the foregoing description, taken in connection with the drawings, that the operation of the lock is as follows, premising that the locks stand in locked position, as indicated in Fig. 1. To unlock or disengage the catch from the cam-groove, pressure on the thumb-piece 18 will carry the catch out of the cam-groove and lodge its hooked end behind the trigger. The sashes can then be moved as desired. When it is desired to restore the sashes to fully-closed position, the upper one can be moved up to its place and the lower one pulled clear down,

and just as it reachesits lowest position the lug 18 will contact with and depress the trigger, when the force of the torsional spring will swing the sleeve and carry the catch into engagement with the cam-groove and lock the sashes together.

Having thus fully described my invention,

what I claim as new, and desire to secure by Letters Patent, is.

1. A sash-lock, comprising a plate secured to the lower rail of the upper sash, a revoluble sleeve formed with a lateral locki ng-catch, a spring, to actuate the sleeve, formed with an extension constituting a trigger to hold the catch disengaged, a plate on the upper rail of the lower sash, formed with acain-slot, and a lug to engage the trigger and release the catch, substantially as described.

2. A sash-lock, comprising a plate adapted to be secured to the lower rail of the upper sash, and formed with a vertical spindle having an annular groove on its lower portion, a sleeve formed with avcatch revolubly fitted on spindle, a torsional spring in the annular groove of the spindle having one end secured in the sleeve and the other extended and secured to the plate and extended from the point of connection to form a trigger, a plate ELIAS MILLER.

Witnesses:

MINNIE E. CAVANAUGH, KITTIE TRAINOR. 

